[PowerDesigner]
Very good database design Tools, used before, let’s summarize today.
PowerDesigner is a powerful software capable of database design. It is a database modeling tool comm
Author: Simo
How to add foreign keys to an existing SQLite table?
I have the following table:
CREATE TABLE child(
id INTEGER PRIMARY KEY,
parent_id INTEGER,
description TEXT); How to add foreign key constraints on parent_id? Assume that foreign keys are enabled.
Most examples assume that you are creating a table-I want to add constraints to an existing table.
PowerDesigner Using Tutorials (Text Tutorial)
1. Now start using PowerDesigner to create a database, first run the program and enter the main interface:
2.File—New Model—Physical Data Model—Physical Diagram—Model name< /strong> is set to
Where can I find the old SQLite version of the source file?
The downloads page on www.sqlite.org seems to have only a link to the current version. I want to get a previous version. I don’t see any obvious links to historical versions on the website (unless
Import SQLite Database from SDCARD to Android – No Assets folder
I am trying to import my sqlite database from sdcard or any external location to my Android application. My application requires database import so that the database schema will not change, but the
Create a SQLite database (2)
First create a database table, and then perform the delete update operation in the main activity
public< /span> class MainActivity extends AppCompatActivity {
@Override
protected void
PowerDesigner use tutorial
PowerDesigner is a very powerful modeling tool software, comparable to Rose, and it is also one of the most famous modeling software today. Rose is a modeling tool that specializes in UML object mo
PowerDesigner (4) – Business Processing Model
The original text is from: http://www.voidcn.com/article/p-rkyhvfes-oy.html
Business processing model
The Business Process Model (BPM) takes business requirements as the starting point,
How to convert Unix era in SQLite
Can you help me convert the unix era into the format yyyy-mm-dd hh:mm:ss(24h) in sqlite? (GMT 7 is very appreciated).
For example: from 1319017136629 to 4:38:56 PM GMT 7 on Wednesday, October
Use the Order By clause in the group_concat function in SQLite
I don’t think I can use the ORDER BY clause in the GROUP_CONCAT function.
Does anyone know a tricky way to implement this behavior in SQLite? ?
I have seen this question before. But I h